Face sunscreen provides men with essential protection from the sun's harmful UVA and UVB rays. It helps protect against premature skin aging, sunburn, and potential long-term risks such as skin cancer. Generally, face sunscreen will have an SPF (Sun Protection Factor) rating that denotes its ability to block out the sun's rays for a specific time. However, based on this rating, men should be cautious not to have a false sense of security as no product can guarantee 100% protection from the sun's damaging rays.